Quality
An uncompromising commitment to quality
Safety requires outstanding quality. With a strict, certified quality
management, exclusive in-house assembly and carefully chosen
suppliers, Gelbau consequently focuses on uncompromising product
quality “Made in Germany”.
First-class materials are the basis for the maximised functionality and long life cycles of our products. With the two rubbers NBR and EPDM, Gelbau has opted for materials that make an important contribution to the applicational safety.
Our special-quality rubber
NBR – Nitrile butadiene rubber
Synthetic special-quality rubber with high swell-resistance to fuels, oil, grease and aliphatic solvents. Not recommended in conjunction with aromatic solvents, pure benzene, toluene, and ozone or sunlight exposure.
EPDM – Ethylene propylene diene monomer
Synthetic all-purpose rubber with excellent resistance to aging, ozone, sunlight, weather conditions and other environmental factors as well as alkalis, corona and various dyes and chemicals. Not resistant to hydrocarbon solvents, turpentine or petrol.
- Internat. abbreviationNBREPDM
- Hardness range / shore40 to 9035 to 90
- Tear resistance N/mm² at +20 °Cup to approx. 20up to approx. 20
- Tensile deformationup to approx. 450%up to approx. 450%
- Rebound resilience at +20 °C
- Resistance to wear and abrasion
- Resistance to permanent deformation
- General resistance to weather conditions
- Resistance to ozone
- Resistance to oil
- Resistance to fuel
- Gas impermeability
- Resistance to solvents
- General resistance to acids
- Dielectric characteristic
- Thermal stability short-termapprox. −40 to +150 °Capprox. −50 to +170 °C
- Thermal stability longer-termapprox. −30 to +120 °Capprox. −30 to +140 °C
- Resistance to steam